The HD 221287 system contains 1 exoplanet. It is located 182.40 light years away from the solar system.
| Mass | 1.25 solar masses |
| Radius | 1.14 solar radiae |
| Temperature | 6304 kelvin |
| Stellar Metallicity | -0.03 decimal exponent |
| Age | 1.3 billion years |
At more than 50 Earth masses, HD 221287 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 982.050 Earth masses |
| Density | 2.400 grams per cubic centimeter |
| Radius | 13.100 Earth radiae |
| Semi-major Axis | 1.25 AU |
| Eccentricity | 0.08 |
| Orbital Period | 456.100 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2007-08 |
| Reference | Naef et al. 2007 |